From 48907e39890590792c58272604cfb34ad1d80054 Mon Sep 17 00:00:00 2001 From: Francois Romieu Date: Sun, 10 Sep 2006 23:33:44 +0200 Subject: [PATCH] 8139cp: ring_info removal for the transmit path As long as the descriptor fits on a single cacheline, the change should be almost free. Now ring_info is not used at all. Remove it. Signed-off-by: Francois Romieu --- drivers/net/8139cp.c | 32 +++++++++++++------------------- 1 file changed, 13 insertions(+), 19 deletions(-) diff --git a/drivers/net/8139cp.c b/drivers/net/8139cp.c index bbdaa18879ab..c3b8400bdc3f 100644 --- a/drivers/net/8139cp.c +++ b/drivers/net/8139cp.c @@ -314,11 +314,6 @@ struct cp_desc { u64 addr; }; -struct ring_info { - struct sk_buff *skb; - u32 len; -}; - struct cp_dma_stats { u64 tx_ok; u64 rx_ok; @@ -360,7 +355,7 @@ struct cp_private { unsigned tx_head ____cacheline_aligned; unsigned tx_tail; struct cp_desc *tx_ring; - struct ring_info tx_skb[CP_TX_RING_SIZE]; + struct sk_buff *tx_skb[CP_TX_RING_SIZE]; unsigned rx_buf_sz; unsigned wol_enabled : 1; /* Is Wake-on-LAN enabled? */ @@ -721,11 +716,12 @@ static void cp_tx (struct cp_private *cp) if (status & DescOwn) break; - skb = cp->tx_skb[tx_tail].skb; + skb = cp->tx_skb[tx_tail]; BUG_ON(!skb); pci_unmap_single(cp->pdev, le64_to_cpu(txd->addr), - cp->tx_skb[tx_tail].len, PCI_DMA_TODEVICE); + le32_to_cpu(txd->opts1) & 0xffff, + PCI_DMA_TODEVICE); if (status & LastFrag) { if (status & (TxError | TxFIFOUnder)) { @@ -752,7 +748,7 @@ static void cp_tx (struct cp_private *cp) dev_kfree_skb_irq(skb); } - cp->tx_skb[tx_tail].skb = NULL; + cp->tx_skb[tx_tail] = NULL; tx_tail = NEXT_TX(tx_tail); } @@ -822,8 +818,7 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev) txd->opts1 = cpu_to_le32(flags); wmb(); - cp->tx_skb[entry].skb = skb; - cp->tx_skb[entry].len = len; + cp->tx_skb[entry] = skb; entry = NEXT_TX(entry); } else { struct cp_desc *txd; @@ -839,8 +834,7 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev) first_len = skb_headlen(skb); first_mapping = pci_map_single(cp->pdev, skb->data, first_len, PCI_DMA_TODEVICE); - cp->tx_skb[entry].skb = skb; - cp->tx_skb[entry].len = first_len; + cp->tx_skb[entry] = skb; entry = NEXT_TX(entry); for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { @@ -881,8 +875,7 @@ static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev) txd->opts1 = cpu_to_le32(ctrl); wmb(); - cp->tx_skb[entry].skb = skb; - cp->tx_skb[entry].len = len; + cp->tx_skb[entry] = skb; entry = NEXT_TX(entry); } @@ -1159,12 +1152,13 @@ static void cp_clean_rings (struct cp_private *cp) } for (i = 0; i < CP_TX_RING_SIZE; i++) { - if (cp->tx_skb[i].skb) { - struct sk_buff *skb = cp->tx_skb[i].skb; + if (cp->tx_skb[i]) { + struct sk_buff *skb = cp->tx_skb[i]; desc = cp->tx_ring + i; pci_unmap_single(cp->pdev, le64_to_cpu(desc->addr), - cp->tx_skb[i].len, PCI_DMA_TODEVICE); + le32_to_cpu(desc->opts1) & 0xffff, + PCI_DMA_TODEVICE); if (le32_to_cpu(desc->opts1) & LastFrag) dev_kfree_skb(skb); cp->net_stats.tx_dropped++; @@ -1175,7 +1169,7 @@ static void cp_clean_rings (struct cp_private *cp) memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE); memset(cp->rx_skb, 0, sizeof(struct sk_buff *) * CP_RX_RING_SIZE); - memset(&cp->tx_skb, 0, sizeof(struct ring_info) * CP_TX_RING_SIZE); + memset(cp->tx_skb, 0, sizeof(struct sk_buff *) * CP_TX_RING_SIZE); } static void cp_free_rings (struct cp_private *cp) -- 2.39.2